A camera steadying device for steadying a camera while taking a picture. The n-type MIS transistor includes a first gate electrode formed on a first active region and a first sidewall formed on the side face of the first gate electrode. When a user thread in a process is to engage in a collective operation, it notifies its process’s slave thread, which notifies the master process. There is provided a radiation CT radiographing device in which the object can be photographed at arbitrary resolution during the photographing, a fluctuation of a radiation source during the photographing can be detected without using a special detector and corrected in accordance with its detection amount. Each terminal hole has a pair of opposite inner walls. The elastic band provides support to the pack without covering the gas-permeable portions of the pack.